丙烯酰胺自水解木质纤维素原位聚合研究

IF 20.2 Q1 MATERIALS SCIENCE, PAPER & WOOD Journal of Bioresources and Bioproducts Pub Date : 2023-08-01 DOI:10.1016/j.jobab.2023.01.004
Haosong Zhao, Weijue Gao, Pedram Fatehi
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引用次数: 0

摘要

本研究将云杉木屑自水解产生的水解产物直接用作生产混凝剂的原料。成功地进行了丙烯酰胺(AM)和木质纤维素(LC)的原位聚合。在3 h、60 ℃、4% (w)引发剂(以水解液干燥质量为基础)、AM/LC摩尔比为5.63的条件下,优化得到分子量最高(41,060 g/mol)、电荷密度最高(-0.25 meq/g)的木质纤维素-丙烯酰胺(LC-AM)。核磁共振波谱证实了丙烯酰胺在LC上的接枝。采用元素分析仪、zeta电位分析仪、凝胶渗透色谱(GPC)和粒子电荷检测器(PCD)对LC-AM的其他性质进行了表征。应用LC-AM作为混凝剂从模拟染料溶液中去除乙基紫染料。结果表明,在0.2 g/g的低剂量下,染料去除率为47.2%。建议将LC-AM与其他聚合物进行双絮凝脱色,进一步提高其脱色效果。
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In-situ polymerization of lignocelluloses of autohydrolysis process with acrylamide

In the present study, the hydrolysates generated via autohydrolysis of spruce wood chips were directly used as feedstock for producing coagulants. The in-situ polymerization of acrylamide (AM) and lignocellulose (LC) of hydrolysates was successfully conducted. The reaction was optimized to generate lignocellulose-acrylamide (LC-AM) with the highest molecular weight (41,060 g/mol) and charge density (–0.25 meq/g) under the optimum conditions, which were 3 h, 60 ℃, 4% (w) initiator based on the dried mass of hydrolysate, and an AM/LC molar ratio of 5.63. A nuclear magnetic resonance (NMR) spectroscopy confirmed the grafting of acrylamide on LC. Other properties of LC-AM were characterized by the elemental analyzer, zeta potential analyzer, gel permeation chromatography (GPC), and particle charge detector (PCD). The LC-AM was applied as a coagulant for removing ethyl violet dye from a simulated dye solution. The results indicated that 47.2% dye was removed from the solution at a low dosage of 0.2 g/g. The dual flocculation of LC-AM with other polymers for dye removal is suggested to further improve its effectiveness.

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来源期刊
Journal of Bioresources and Bioproducts
Journal of Bioresources and Bioproducts Agricultural and Biological Sciences-Forestry
CiteScore
39.30
自引率
0.00%
发文量
38
审稿时长
12 weeks
期刊最新文献
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